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Polarized Raman spectrum and normal coordinate analysis of α‐MnMoO 4
Author(s) -
Kanesaka Isao,
Hashiba Hideto,
Matsuura Ikuya
Publication year - 1988
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.1250190312
Subject(s) - raman spectroscopy , force constant , infrared , chemistry , normal mode , ion , analytical chemistry (journal) , bond length , vibration , computational chemistry , nuclear magnetic resonance , molecule , crystallography , crystal structure , optics , physics , organic chemistry , quantum mechanics
Abstract The poarized Raman spectum of α‐MnMoO 4 and the infrared spectrum of the poycrystalline material are reported. The observed bands were assigned on the basis of a normal coordinate analysis using a valences force field. Force constants of molybdate ions were examined in detail. Lattic vibrations are explained mainly in terms of MnO streching force constants. Coupling between MoO stretchings on MoO bonds of differents lengths is slight and in general a v 2 ‐like mode is higher in frequesncy than a v 4 ‐like mode. The position of oxygen atoms substituted after an oxidation reaction of an olefin by using an 18 O tracer is identified.